Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance.

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Learn about the difference between inheritance and composition in Java and when to use each technique.

Java inheritance vs. composition: How to choose

<p>Composition is good if you already have closed types that cannot be changed. Then you can just create wrapper accessors to reach different instances. Inheritance is better when possible because it treats subclasses and upper classes as one. We can still separate concerns and the code stays simple.</p>
